sereinsky



L. R. SEREINSKY.

MOVING PICTURE MACHINE.

APPLICATION FILED JULY 21.1911.

mute c Patented Oct. 14, 1919.

Fig.5.

- LOUIS R. SEREIII SKY, F INDIANAPOLIS, INDIANA.

Specification of Letters ratent.

MOVING-PICTURE MACHINE.-

Appllcation filed July 21, 1917., Serial No. 181,996.

To all whom it may concern:

Be it known that I, LOUIS R. SEREINSKY, a citizen of the United States,residing at Indianapolis, Marion county, and State of.

Indiana, have invented and discovered certain new and usefulImprovements in Moving-Picture Machines, of which the following is aspecificatio My invention relates to moving picture machines and itsobject is to provide means whereby only safety films having a certainformation may be employed upon machines of a certain type, and whichfilms may also be used on standard machines.

In the moving picture; machine art, two

classes of machines with respect to their compliance 'with fireproofconditions are employed. In standard machines which are of comparativelylarge and expensive construction, therequirements as to rendering thesame safe against fire are carried out by suitable housings, insulationsand other protective means conforming to the fire underwritersrequirements, and in this class of machines it, is not required thatsafety or non-inflammable films be used. In the other class of machines,which are usually of smaller size and ordinarily of a portable type andin which it is impracticable to comply with the requirements as toexterior fireproofin means, it is required under the rules of the e,underwriters that such machines use safety or non-ihflanmable films and:that the machines be so made that only safety films of a certainnon-standard form can beused thereon, and so that the standard filmcannot be used on these machines. I These conditions render itimpossible to use the special film on standard machines.

The object of my invention is to provide means whereby only a film ofthe safety,- non-inflammable type maybe used by protidingsciallcomplementary means on the safety fi lfii and on the machineswhereby such parts will be keyed to one another,

whereby only a film so made can be emloyed on this special machine, andwherey if a film not so formed is used upon the machine it cannot beused or will be destroyed y theaction thereof, and-whereby the s ial,safety film may be em l stan ard machines. 0f course, the safety film ofspecial form and the keying means on the machine may be advantageouslyem- 5 ployed in the large standard machines and and oyed on enagle theprotective housing to be dispensed wit With this object imview, myinvention is embodied in preferable form in the construction andarrangementhereinafter described Patented Oct. 14, 1919.

and illustrated in the accompanying draw- 11 these drawings, Figure 1 isa sectional diagrammatical View illustrating a film and the drivingsprockets therefor; Fig. 2 isa perspective view of a hub sleeve carryingone set of driving sprockets and illustrating one form of that part ofmy invention which is applied to themachine; Fig. 3 is a plan view of apart of a film having the other feature of said form of my invention;Fig. 4 is a plan, viewof a modified form of that part of the inventionwhich is applied to the machine, and Fig. 5 is a plan view of part of afilm intended to be used in connection with the arrangement shown in Fi4.

Referring to the drawings 1 indicates a driving sprocket of a pair of srockets near one end of the flat stretch o film roll of standard widthand 2 indicates a, similar sprocket adjacent to the other end thereof.

The sprocket 2 is mounted on a hub sleeve 3 carrying at the other endthereof a sprocket 4.. The teeth 5 of these driving sprockets areadapted to engage holes 6 formed in the borders of a film 7, in theusual manner, for the purpose of driving the film.

Mounted on the hub 3, preferably in the center thereof, is a wheel 8having sprocket teeth 9, which s rocket teeth project at least beyondthe surfaces of the wheels 2 and 4 referabl extend as far as the teeth5, and beyond ,tlie plane of the film when the latter is in drivingposition.

The film 7, in my invention, is made of, some suitable noninflammable,safety material, such material being well known in this art and thecomposition of which it is unnecessary to here set forth. Formed atintervals in the body of this film and at the openings are adapted toreceive the said teeth 9- as the sprocket wheels are driven and theythus ermit said teeth to project freely through t e, filmand ermitthedriving openings 6 on the bor ers of the film to freely engage thedriving teeth 5 of the wheels 4. The safety film and the nonsafetymachine are thus keyed together.

l/Vhen, however, a film unprovided with the apertures 10 is attempted tobe used upon a machine having the wheel 8, the teeth 9 thereof will rideagainst the film and either rupture and destroy the same or force thefilm away from the driving sprocket teeth 5 so as to prevent theoperation of the film.

In Figs. 4 and 5, a modification of the keyed, interfitting arrangementof safety film and non-safety machine is shown in which 11 is a hubsleeve carrying driving sprockets 12 and 13, on one of which sprocketsor on both, if desired, is formed outside of the main sprocket teeth,auxiliary teeth 11. The driving teeth of the sprockets are adapted toengage the usual driving wheels 15 formed in the border of the film 16.The film 16 is of non-inflammable material and along one or both of itsouter edges in the border portions of the film it is provided withrecesses or scallops 17 adapted to receive and lit the teeth 14 on thedriving sprockets. By means of this arrangement when asatety film of theform shown in Fig. 5 is employed in connection with a machine of theconstruction shown in Fig. 4, the recesses or scallops 17 will freelyfit the teeth 14 and the driving openings 15 are permitted to freelyengage the sprocket teeth on the wheels 12 and 13. However, should itbeattempted to employ a film unprovided with the recesses 17 on a machineof the type shown in Fig. 4c, the teeth 14: would ride on the undersurface of the border of the film and force the film out of engagementwith the drivin teeth of the sprockets,

12 and 18, thus ren ering it impossible to drive the film.

The above constructions in addition to keying the safety film to thespecial machine also enables a film of such width and other dimensionsand form to be employed as to render it possible to be used on standardmachines.

It will be seen that the auxiliary recesses for the additional, longerteeth are out of alinement with the standard sprocket engaging recesses,thus permitting the usual size and spacing ofthese standard drivingopenings to be employed, thereby enabling the usual cut out and pastingoperations frequently required, to be performed with the same facilityas in the standard film, permitting the full strength of the recessedmargins to be retained, and also enabling the recesses for the longteeth to be added to a standard film by merely running the same througha suitable cutting machine.

By the term standard as used in the claims below it is intended to referthose sprocket wheels, films and openings now commonly in use on theordinary machine, such openings in the standard films being in two rowson opposite sides of the picture and in alinement and equally spaced.

Having thus described my invention, what I claim is:

1. In moving picture machines, the com bination with film drivingsprocket teeth, a

film having standard openings to receive said teeth, of additionalprojecting means on the machine adapted to prevent the use of a film ofstandard form, the film having recesses out of longitudinal alinementwith the driving sprocket openings and adapted to receive saidadditional projecting means.

2. In moving picture machines, the combination with standard drivingsprocket wheels, and auxiliary teeth outside of the line of the sprocketteeth, of a non-inflammable film having driving holes in its borderportions to engage the sprocket wheel teeth and having recesses in theedge of the film beyond said driving holes to receive the said auxiliaryoutside teeth.

3. A film for motion picture machines having a set of standard openingsand an additional set of recesses on the edge of the film, all suchrecesses and openings being adapted to receive sprocket wheel teeth ofmotion picture projectors.

ln witness whereof, I havehereunto set my hand and seal at Indianapolis,Indiana this 15th day of February, A. D. nineteen hundred and seventeen.

LOUIS R. SEREINSKY.

